Open MPI logo

Open MPI User's Mailing List Archives

  |   Home   |   Support   |   FAQ   |   all Open MPI User's mailing list

Subject: Re: [OMPI users] mpirun/exec requires ssh?
From: Olaf Lenz (lenzo_at_[hidden])
Date: 2009-03-23 13:51:44


Hi!

Ralph Castain wrote:
> I regularly run jobs like that on 1.3.1 - it has no desire to use ssh to
> start anything. On a local host such as this command uses, all mpiexec
> does is fork/exec the procs.

That sounds strange. I'm just going back and forth between OpenMPI 1.2.9
and OpenMPI 1.3.1 by using make uninstall/make install, and I can always
reproduce the behavior.

> It sounds like something strange is going on in your environment that
> makes OMPI think it is launching on a remote host. Most likely cause is
> something in your Ethernet configuration. Can you send us the output of
> ifconfig (or whatever your equivalent is)?

Ok, here is some information on my system:
* Kubuntu 9.04 (Jaunty) alpha 6
* Core Duo CPU
* I have compiled both OpenMPI versions (1.2.9 and 1.3.1) myself, using

configure --prefix=$HOME/software --enable-shared --enable-static

Output of some ifconfig:
> ifconfig
eth0 Link encap:Ethernet HWaddr 00:1e:37:15:1b:70
           inet addr:192.168.1.1 Bcast:192.168.1.255 Mask:255.255.255.0
           inet6 addr: fe80::21e:37ff:fe15:1b70/64 Scope:Link
           UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
           RX packets:34185 errors:0 dropped:0 overruns:0 frame:0
           TX packets:29386 errors:0 dropped:0 overruns:0 carrier:0
           collisions:0 txqueuelen:100
           RX bytes:25645492 (25.6 MB) TX bytes:3921545 (3.9 MB)
           Memory:fe000000-fe020000

lo Link encap:Local Loopback
           inet addr:127.0.0.1 Mask:255.0.0.0
           inet6 addr: ::1/128 Scope:Host
           UP LOOPBACK RUNNING MTU:16436 Metric:1
           RX packets:5372 errors:0 dropped:0 overruns:0 frame:0
           TX packets:5372 errors:0 dropped:0 overruns:0 carrier:0
           collisions:0 txqueuelen:0
           RX bytes:661715 (661.7 KB) TX bytes:661715 (661.7 KB)

tun0 Link encap:UNSPEC HWaddr
00-00-00-00-00-00-00-00-00-00-00-00-00-00-00-00
           inet addr:10.20.143.6 P-t-P:10.20.143.5 Mask:255.255.255.255
           UP POINTOPOINT RUNNING NOARP MULTICAST MTU:1500 Metric:1
           RX packets:2234 errors:0 dropped:0 overruns:0 frame:0
           TX packets:3158 errors:0 dropped:0 overruns:0 carrier:0
           collisions:0 txqueuelen:100
           RX bytes:940549 (940.5 KB) TX bytes:207091 (207.0 KB)

You need anything else?

        Olaf